Trane CleanEffects patented air-cleaning technology uses an intense electrical charge to remove up to 99.98 percent of particles from the air entering a home. Its reusable filter only needs cleaning every few months. The system's electrical use compares to that of a 75-watt light bulb, the manufacturer says. Trane. 903.581.3200. www.trane.com.

Scrap Metals

Made from fine flake aluminum milling scrap and polymeric resins, Alkemi solid surfacing can be used for countertops and other surface applications. Alkemi can be cut, seamed, and machined like other solid-surfacing materials. Twelve colors are available in honed or textured finishes. Renewed Materials. 301.320.0042. www.alkemi.com.

Cool Coating

The Tex-Cote Super-Cote Cool Wall system is a heat-reflective exterior coating that can reduce exterior wall temperatures by up to 40 degrees F, lowering interior temperatures. The finish, which is 10 times thicker than paint, is applied in a multi-step process with no need for scraping or sanding. Textured Coatings of America. 800.454.0340. www.texcotehomes.com.